A recent lawsuit filed in Seattle federal court accuses Starbucks of misleading consumers with its “sugar-free” labeling on eight protein beverages. Despite being marketed as sugar-free, these drinks actually contain between 13 and 21 grams of sugar per venti-size serving due to the natural sugar in milk. The lawsuit alleges that Starbucks aimed to capitalize on the protein trend and customers’ nutritional preferences.
Starbucks refuted the claims, stating that they have consistently provided information on their protein beverages, sugar-free options, and nutritional content. The controversy raises questions about whether the labeling is deceptive and if it applies to both U.S. and Canadian markets.
The lawsuit lists the specific drinks in question, such as sugar-free vanilla protein latte and sugar-free caramel protein matcha, available on both Starbucks U.S. and Canada websites. Starbucks introduced these beverages in September 2025 to cater to customers seeking protein-rich options.
While these drinks contain natural sugars from milk, the lawsuit argues that labeling them as sugar-free is misleading. In the U.S., federal law prohibits beverages labeled as “sugar-free” from containing more than 0.5 grams of sugar per 12-ounce serving, regardless of the source of sugar.
In Canada, products labeled as sugar-free must contain less than 0.5 grams of sugar per reference amount and serving size. The lawsuit seeks damages for false advertising and violations of consumer protection laws, aiming to have the case certified as a class action.
Consumers, especially those with health concerns like diabetes, may be impacted by mislabeling of sugar content in beverages. The lawsuit highlights the importance of accurate labeling for consumers making informed choices about their food and drink options.